Matters drill bits during use should be noted

Always check the concentricity of the clamping force of the spindle and collet and collet chuck, concentricity good cause broken drill bits small diameter drill bitsing and pore size, etc., the clamping force is not good cause actual speed and set speed is not met, the slip between the chuck and glass drill bit.

Shank drill bits set at the head of the clamping length collet shank diameter of 4 to 5 times in order to clamp securely.

Always check the spindle presser foot. Presser foot contact surfaces must be level and the vertical axis can not shake off the drill bits to prevent sds plus hammer drill bits produced and partial holes.

drill bitsing is better suction, vacuum wind can reduce drill bits temperature, while away the dust reducing friction heat.

Laminated substrate including the upper and lower plate to be positioned firmly in the work bench drill bitsing a hole in a trough positioning systems, flat. The need to prevent the use of adhesive tape on the diamond core drill bit so that the tape adheres drill bits cuttings, causing difficulties and chip off the diamond.